Self-emulsifying cannabidiol formulations

ABSTRACT

The present invention is directed to a self-emulsifying cannabidiol composition containing one or more surfactants. The present invention is further directed to a method of treating a disease comprising administering a composition of the present invention to a subject in need thereof. The present invention is further directed to a method of treating withdrawal symptoms.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority to U.S. application No. 62/847,991, filed May 15, 2019 (expired). The entire contents are which are hereby incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention is directed to a self-emulsifying cannabidiol composition containing one or more surfactants. The present invention is further directed to a method of treating a disease comprising administering a composition of the present invention to a subject in need thereof. The present invention is further directed to a method of treating withdrawal symptoms comprising administering a composition of the present invention to a subject in need thereof.

BACKGROUND OF THE INVENTION

Cannabidiol, (−)-trans-2-p-mentha-1,8-dien-3-yl-5-pentylresorcinol, is non-psychoactive and has shown promise in treating numerous diseases and disorders. Cannabidiol has been approved by the United States Food and Drug Administration for to treat Lennox-Gastaut syndrome, Dravet syndrome. Further, cannabidiol, may be suitable for the treatment of diseases or disorders, or symptoms of diseases or disorders, such as mycolonic seizures, juvenile mycolonic epilepsy, refractory epilepsy, schizophrenia, juvenile spasms, West syndrome, refractory infantile spasms, infantile spasms, tubular sclerosis complex, brain tumors, neuropathic pain, cannabis use disorder, post-traumatic stress disorder, anxiety, early psychosis, Alzheimer's Disease autism, and withdrawal from opioids, cocaine, heroin, amphetamines, and nicotine.

While there are many dosage forms of cannabidiol the most popular form is oral. Oral formulations of cannabidiol are more convenient and are more likely to lead to patient compliance. Oral dosages of cannabidiol has been formulated in hydroalcoholic and lipid-based formulations. The issue with these oral formulations is that they have poor solubility and thus poor bioavailability in water such as encountered in the gastrointestinal tract when imbibed.

To combat poor solubility formulation scientist have developed Self-Emulsifying Drug Delivery system (SEDDS). SEDDS have shown to improve solubilization of poorly soluble drugs, improve the bioavailability due to reduced first pass metabolism and improved absorption through lymphatic transport by forming chylomicrons. However, developing a SEDDS is a painstaking task that differs for each active ingredient. The specific excipients and concentrations may only be discovered through intense formulation research.

Accordingly, there is a need in the art for a cannabidiol formulation that self emulsifies in contact with an aqueous medium.

SUMMARY OF THE INVENTION

The present invention is directed to a self-emulsifying cannabidiol composition comprising from about 1 to about 40% w/w cannabidiol and from about 40% to about 99% w/w of one or more surfactants selected from polyethylene glycol 40 hydrogenated castor oil, caprylocaproyl polyoxyl-8 glycerides, lauoryl polyoxylglycerides, oleoyl polyoxyl-6 glycerides, linoleoyl polyoxyl-6 glycerides, lauroyl polyoxyl-6 glycerides, propylene glycol monocaprylate, propylene glycol monolaurate, polyglyceryl-3 dioleate, a polysorbate and sorbitan monooeate.

The present invention is further directed to a self-emulsifying cannabidiol composition comprising:

-   -   from about 5% to about 35% w/w cannabidiol;     -   from about 2% to about 60% w/w polyethylene glycol 40         hydrogenated castor oil;     -   from about 2% to about 50% w/w of a surfactant selected from         caprylocaproyl polyoxyl-8 glycerides, linoleoyl polyoxyl-6         glyceride or a combination thereof; and     -   from about 0.1% to about 2% w/w alpha tocopherol.

The present invention is further directed to a method of treating a disease selected from Prader-Willi syndrome, obesity, graft versus host disease, gelastic seizures/hypothalamic hamartoma, neonatal seizures, dystonia, central pain syndromes, phantom limb pain, multiple sclerosis, traumatic brain injury, radiation therapy, acute graft versus host disease, chronic graft versus host disease, T-cell autoimmune disorders, colitis, Dravet Syndrome, Lennox Gastaut Syndrome, mycolonic seizures, juvenile mycolonic epilepsy, refractory epilepsy, childhood absence epilepsy, schizophrenia, juvenile spasms, West syndrome, infantile spasms, refractory infantile spasms, tuberous sclerosis complex, brain tumors, neuropathic pain, cannabis use disorder, post-traumatic stress disorder, anxiety, early psychosis, Alzheimer's Disease, autism, acne, Parkinson's disease, social anxiety disorder, depression, diabetic retinopathy, diabetic nephropathy, diabetic neuropathy, ischemic injury of heart, ischemic injury of brain, chronic pain syndrome, and rheumatoid arthritis comprising administering a composition of the present invention to a subject in need thereof.

The present invention is further directed to a method of treating withdrawal symptoms comprising administering a composition of the present invention to a subject in need thereof, wherein the withdrawal symptoms are caused by the subject reducing or quitting use of an opioid, cocaine, heroin, an amphetamine or nicotine.

BRIEF DESCRIPTION OF THE DRAWINGS

The subject matter of the present disclosure is particularly pointed out and distinctly claimed in the concluding portion of the specification. A more complete understanding of the present disclosure, however, may best be obtained by referring to the detailed description and claims when considered in connection with the drawing figures.

FIG. 1. Shows an illustration of plasma concentration of cannabidiol after administration of Composition 5 from time 0 to 96 hours.

FIG. 2. Shows an illustration of plasma concentration of cannabidiol after administration of Composition 5 from time 0 to 8 hours.

DETAILED DESCRIPTION OF THE INVENTION

The detailed description of exemplary embodiments herein makes reference to the accompanying drawings which show exemplary embodiments by way of illustration and their best mode. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the inventions, it should be understood that other embodiments may be realized and that logical, chemical, and mechanical changes may be made without departing from the spirit and scope of the inventions. Thus, the detailed description herein is presented for purposes of illustration only and not of limitation. For example, the steps herein recited in any of the method of process descriptions may be executed in any order and are not necessarily limited to the order presented. Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component or step may include a singular embodiment or step. Also, any reference to attached, fixed, connected or the like may include permanent, removable, temporary, partial, full and/or any other possible attachment option. Additionally, any reference to without contact (or similar phrases) may also include reduced contact or minimal contact.

Applicant unexpectedly found that the presence of particular surfactants in a cannabidiol composition form an emulsion with an average globule size capable of passing through the gastrointestinal tract when dispersed in an aqueous medium.

In one embodiment, the present invention is directed to a self-emulsifying cannabidiol composition comprising from about 1 to about 40% w/w cannabidiol and from about 40% to about 99% w/w of one or more surfactants selected from polyethylene glycol (“PEG”) 40 hydrogenated castor oil, caprylocaproyl polyoxyl-8 glycerides, lauoryl polyoxylglycerides, oleoyl polyoxyl-6 glycerides, linoleoyl polyoxyl-6 glycerides, lauroyl polyoxyl-6 glycerides, propylene glycol monocaprylate, propylene glycol monolaurate, polyglyceryl-3 dioleate, a polysorbate and sorbitan monooleate.

In a preferred embodiment, the present invention is further directed to a self-emulsifying cannabidiol composition comprising:

-   -   from about 5% to about 35% w/w cannabidiol;     -   from about 2% to about 60% w/w PEG 40 hydrogenated castor oil;     -   from about 2% to about 50% w/w of a surfactant selected from         caprylocaproyl polyoxyl-8 glycerides, linoleoyl polyoxyl-6         glyceride or a combination thereof; and     -   from about 0.1% to about 2% w/w alpha tocopherol.

Cannabidiol may be present in compositions of the present invention at a concentration from about 0.1% to about 50% w/w, preferably from about 1% to about 40% w/w, more preferably from about 5% to about 35% w/w, even more preferably from about 10% to about 30% w/w or about 10% to about 20% w/w.

Surfactants suitable for use in the present invention include, but are not limited to, PEG 40 hydrogenated castor oil, caprylocaproyl polyoxyl-8 glycerides, lauoryl polyoxylglycerides, oleoyl polyoxyl-6 glycerides, linoleoyl polyoxyl-6 glycerides, lauroyl polyoxyl-6 glycerides, propylene glycol monocaprylate, propylene glycol monolaurate, polyglyceryl-3 dioleate, a polysorbate and sorbitan monooleate. In a preferred embodiment, surfactants may be selected from PEG 40 hydrogenated castor oil, caprylocaproyl polyoxyl-8 glycerides, linoleoyl polyoxyl-6 glycerides, polyglyceryl-3 dioleate, polysorbate 80 or a combination thereof.

The one or more surfactants may be present in compositions of the present invention at a concentration from about 1% to about 99% w/w, preferably from about 40% to about 99% or from about 2% to about 50% w/w, even more preferably from about 40% to about 80% w/w or from about 20% to about 40% w/w and yet even more preferably from about 44% to about 78% w/w.

Polyethylene glycol (“PEG”) 40 hydrogenated castor oil may be present in compositions of the present invention at a concentration from about 2% to about 60% w/w, preferably from about 10% to about 50% w/w and more preferably from about 10% to about 40% w/w.

Polyglyceryl-3 dioleate may be present in compositions of the present invention at a concentration from about 1% to about 15% w/w, preferably from about 2% to about 12% w/w.

Caprylocaproyl polyoxyl-8 glycerides may be present in compositions of the present invention at a concentration from about 1% to about 30% w/w, more preferably from about 3% to about 26% w/w.

Linoleoyl polyoxyl-6 glycerides may be present in compositions of the present invention at a concentration from about 1% to about 30% w/w, more preferably from about 4% to about 23% w/w.

Polysorbate 80 may be present in compositions of the present invention at a concentration from about 1% to about 10% w/w, more preferably from about 2% to about 6% w/w.

Oils suitable for use in compositions of the present invention include, but are not limited to, glyceryl monolinoleate, glyceryl monooleate, propylene glycol dicaprylocaprate, glycerol monostearate 40-55, a medium chain triglyceride or a combination thereof. In a preferred embodiment, the oil is a medium chain triglyceride, preferably a C8/C10 medium chain triglyceride.

The one or more oils may be present in compositions of the present invention at a concentration from about 1% to about 50% w/w, preferably from about 5% to about 30% w/w, more preferably from about 5% to about 25% w/w.

Medium chain triglycerides may be present in compositions of the present invention at a concentration from about 1% to about 30% w/w, preferably from about 9% to about 24% w/w.

Cosolvents suitable for use in the present invention include, but are not limited to, propylene glycol, polyethylene glycol, ethanol or a combination thereof.

The one or more cosolvents may be present in compositions of the present invention at a concentration from about 1% to about 50% w/w, preferably from about 5% to about 30% w/w, even more preferably from about 12% to about 21% w/w.

Ethanol may be present in compositions of the present invention at a concentration from about 1% to about 20% w/w, preferably from about 5% to about 15% w/w, even more preferably from about 10% to about 15% w/w and most preferably from about 12% to about 14% w/w.

Propylene glycol may be present in compositions of the present invention at a concentration from about 1% to about 20% w/w, preferably from about 5% to about 15% w/w, even more preferably from about 5% to about 10% w/w and most preferably from about 8% to about 10% w/w.

Antioxidants suitable for use in the present invention include, but are not limited to, alpha tocopherol, butylated hydroxy anisole, butylated hydroxy toluene, ascorbyl palmitate, ascorbic acid, sodium ascorbate, sodium metabisulfite, EDTA, citric acid, sodium bisulfite, sodium thiosulfate, thioglycerol, propyl gallate or a combination thereof. In a preferred embodiment, the antioxidant is alpha tocopherol, ascorbyl palmitate or a combination thereof.

The one or more antioxidants may be present in compositions of the present invention at a concentration from about 0.01% to about 2% w/w, preferably from about 0.05% to about 1% w/w and even more preferably from about 0.1% to about 0.5% w/w.

Alpha tocopherol may be present in compositions of the present invention at a concentration from about 0.01% to about 2% w/w, preferably from about 0.01% to about 1% w/w, even more preferably from about 0.05% to about 0.5% w/w and yet more preferably from about 0.05% to about 0.4% w/w.

Ascorbyl palmitate may be present in compositions of the present invention at a concentration from about 0.01% to about 2% w/w, preferably from about 0.01% to about 1% w/w and even more preferably from about 0.05% to about 0.2% w/w.

In another embodiment, the composition of the present invention does not contain sesame oil, castor oil, olive oil or water.

In a preferred embodiment, the compositions of the present invention form an emulsion having an average globule size from about 20 to about 5,000 nanometers when dispersed in an aqueous medium, preferably from about 30 to about 600 nanometers, even more preferably from about 100 to about 1,000 nanometers and yet more preferably from about 100 to about 300 nanometers. In a more preferred embodiment, the aqueous medium is gastric fluid.

In another preferred embodiment, the compositions of the present invention emulsifies in less than 30 minutes upon contact with an aqueous medium including gastric fluid.

In another preferred embodiment, the compositions of the present invention are contained in a soft or a hard gelatin capsule.

In a most preferred embodiment, the present invention is directed to a self-emulsifying cannabidiol composition comprising:

about 20.5% w/w cannabidiol;

about 12.0% w/w ethanol;

about 9.0% w/w propylene glycol;

about 17.0/w/w polyethylene glycol 40 hydrogenated castor oil;

about 26.0% w/w caprylocaproyl polyoxyl-8 glycerides;

about 4.0% w/w linoleoyl polyoxyl-6 glycerides; and

about 0.4% w/w alpha tocopherol,

wherein the composition forms an emulsion having an average globule size of about 201 nanometers when dispersed in an aqueous medium.

In another embodiment, the present invention is directed to a method of treating a disease selected from Prader-Willi syndrome, obesity, graft versus host disease, gelastic seizures/hypothalamic hamartoma, neonatal seizures, dystonia, central pain syndromes, phantom limb pain, multiple sclerosis, traumatic brain injury, radiation therapy, acute graft versus host disease, chronic graft versus host disease, T-cell autoimmune disorders, colitis, Dravet Syndrome, Lennox Gastaut Syndrome, mycolonic seizures, juvenile mycolonic epilepsy, refractory epilepsy, childhood absence epilepsy, schizophrenia, juvenile spasms, West syndrome, infantile spasms, refractory infantile spasms, tuberous sclerosis complex, brain tumors, neuropathic pain, cannabis use disorder, post-traumatic stress disorder, anxiety, early psychosis, Alzheimer's Disease, autism, acne, Parkinson's disease, social anxiety disorder, depression, diabetic retinopathy, diabetic nephropathy, diabetic neuropathy, ischemic injury of heart, ischemic injury of brain, chronic pain syndrome, and rheumatoid arthritis comprising administering a composition of the present invention to a subject in need thereof.

In another embodiment, the present invention is directed to a method of treating withdrawal symptoms comprising administering a composition of the present invention to a subject in need thereof, wherein the withdrawal symptoms are caused by the subject reducing or quitting use of an opioid, cocaine, heroin, an amphetamine or nicotine.

As used herein, all numerical values relating to amounts, weights, and the like, that are defined as “about” each particular value is plus or minus 10%. For example, the phrase “about 10% w/w” is to be understood as “9% w/w to 11% w/w.” Therefore, amounts within 10% of the claimed value are encompassed by the scope of the claims.

As used herein “% w/w” and “percent w/w” refer to the percent weight of the total formulation.

The disclosed embodiments are simply exemplary embodiments of the inventive concepts disclosed herein and should not be considered as limiting, unless the claims expressly state otherwise.

The following examples are intended to illustrate the present invention and to teach one of ordinary skill in the art how to use the formulations of the invention. They are not intended to be limiting in any way.

EXAMPLES Example 1—Preparation of Compositions of the Invention

TABLE 1 Compositions of the Invention % w/w 1 2 3 4 5 Cannabidiol 20.5 30.5 20.4 10.2 10.0 Ethanol 12.0 12.0 12.0 12.0 12.0 Propylene Glycol 9.0 8.0 10.0 10.0 — PEG 40 hydrogenated castor oil 17.1 13.0 17.2 13.0 40.0 Polyglyceryl-3 dioleate 4.7 5.2 2.3 2.3 12.0 Caprylocaproyl polyoxyl-8 glycerides 26.0 19.5 25.5 26.0  3.0 Linoleoyl polyoxyl-6 glycerides 4.3 6.5 — — 23.0 C8/C10 medium chain triglycerides — — 9.5 23.4 — Alpha-tocopherol (Vitamin E) 0.4 0.3 0.3 0.3 — Polysorbate 80 6.0 5.0 2.8 2.8 —

Cremophor® RH40 was used as the source for polyethylene glycol 40 hydrogenated castor oil and is a registered trademark of and available from BASF SE corporation.

Plurol® Oleique CC 497 was used as the source of polyglyceryl-3 dioleate and is a registered trademark of and available from Gattefosse SAS.

Labrasol® was used as the source of caprylocaproyl polyoxyl-8 glycerides and is a registered trademark of and available from Gattefosse SAS.

Labrafil® M 2125 CS was used as the source of linoleoyl polyoxyl-6 glycerides and is a registered trademark of and available from Gattefosse SAS.

Miglyol® 812 was used as the source of C8/C10 medium chain triglycerides and is a registered trademark of and available from Cremer Oleo GMBH & Co.

Method

Alpha-tocopherol and cannabidiol were dissolved in ethanol to create a mixture while mixing. Propylene glycol was then added to this mixture followed by rest of the excipients and mixed well. Polyethylene glycol (“PEG”) 40 hydrogenated castor oil was melted before being added to the mixture. Emulsification time and globule size was measured. Emulsification time is the time it takes 1 gram of the composition to completely disperse in about 200 milliliters of 0.1 N HCl solution while stirring. Globule size is measured using Nicomp ZLS Z3000.

TABLE 2 Emulsification time and globule size Emulsification Time Globule Size (min) (nm) Composition 1 <1 201.1 ± 112.65 Composition 2 <1 563.7 ± 525.95 Composition 3 <1 291.9 ± 196.36 Composition 4 <1 216.1 ± 66.32  Composition 5 12 34.5 ± 9.8 

Results

Compositions 1-4 emulsified in less than 1 minute. Composition 5 took 12 minutes to emulsify. Compositions 1, 3 and 4 created an emulsion having an average globule size of from 201.1 to 291.9 nanometers upon emulsification. Composition 2 created an emulsion having an average globule size of 563.7 nanometers upon emulsification. Composition 5 created an emulsion having an average globule size of 34.5 nanometers.

Example 2—Stability of Composition 6

TABLE 3 Composition 6 % w/w 6 Cannabidiol 18.18 Ethanol 14.0 PEG 40 hydrogenated castor oil 34.67 Polyglyceryl-3 dioleate 9.0 Caprylocaproyl polyoxyl-8 glycerides 3.0 Linoleoyl polyoxyl-6 glycerides 21.0 Alpha-tocopherol (Vitamin E) 0.05 Ascorbyl palmitate 0.1

Method

Composition 6 from Table 3, above, was prepared as in Example 1, above, and subjected to 40° C.±2° C. and 75±5% relative humidity (“RH”) for 2 months and 25° C.±2° C. and 60±5% RH for 3 months. Results can be seen in Tables 4 and 5, below.

TABLE 4 Stability of Composition 6 at 40° C. ± 2° C. and 75 ± 5% RH RRT T = 0 1 Month 2 Month Physical appearance Clear, Clear, Clear, yellow yellow yellow colored colored colored Assay (% of Initial 100.00     96.37    94.24    Conc.) Delta 9-tetra- 1.761 0.01% 0.01% 0.01% hydrocannabinol Trans-(1R,6R)-3′- 1.865 0.04% 0.03% 0.03% methyl-cannabidiol Unknown Impurity 0.319 ND 0.01% 0.02% 0.373 ND ND 0.01% 0.390 ND ND 0.01% 0.436 ND ND 0.02% 0.459 ND 0.02% 0.05% 0.479 ND 0.02% 0.06% 0.500 0.01% 0.05% 0.16% 0.592 ND 0.01% ND 0.681 ND ND 0.01% 0.771 0.05% 0.05% 0.05% 0.789 ND 0.02% 0.06% 0.819 0.02% 0.02% 0.01% 0.825 ND ND 0.01% 0.848 ND ND 0.01% 2.075 ND 0.01% ND Total Impurities 0.08% 0.21% 0.48% RRT denotes relative retention time

TABLE 5 Stability of Composition 6 at 25° C. ± 2° C. and 60 ± 5% RH RRT T = 0 1 Month 2 Month 3 Month Physical appearance Clear, Pale Clear, Pale Clear, Pale Clear, Pale yellow yellow yellow yellow Assay (% of Initial Conc.) 100.00     98.58    96.90    96.31    Delta 9-tetra-hydrocannabinol 1.761 0.01% 0.01% 0.01% 0.01% Trans-(1R,6R)-3′-methyl- 1.865 0.04% 0.03% 0.03% 0.03% cannabidiol Cis-cannabidiol 1.453 0.01% 0.01% 0.01% 0.01% Unknown Impurity 0.313 ND ND 0.01% 0.01% 0.374 ND ND ND 0.02% 0.396 ND 0.01% ND ND 0.452 ND ND ND 0.01% 0.481 ND ND ND 0.01% 0.500 0.01% 0.01% 0.01% 0.01% 0.771 0.05% 0.05% 0.05% 0.06% 0.819 0.02% 0.02% 0.02% 0.02% 2.075 ND 0.01% ND ND Total Impurities 0.08% 0.10% 0.09% 0.14% ND denotes not detected

As seen in Tables 4 and 5, Composition 6 had only 0.48% total impurities after 2 months at 40° C. and 0.14% total impurities after 3 months at 25° C. Thus, compositions of the present invention are stable.

Example 3. Pharmacokinetic Study in Dogs Method

In-vivo bioavailability and pharmacokinetics of Composition 5 was evaluated in Beagle dogs. Specifically, five male Beagle dogs weighing from about 5 to about 11 kilograms were fasted overnight before dosing. Each Beagle dog was then administered 200 milligrams of cannabidiol in the form of Composition 5. Blood samples were collected at 0, 15 and 30 minutes and 1, 2, 3, 4, 8, 12, 24, 48, 72 and 96 hours after dosing.

The following pharmacokinetic parameters were calculated: peak concentration in plasma (“C_(max)”), time to peak concentration (“T_(max)”) and area under the concentration-time curve (“AUC”). Results of this study can be seen in Table 6, below and in FIGS. 1 and 2.

TABLE 6 Pharmacokinetic parameters Cmax (ng/mL) 672.84 ± 400.68 Tmax (h) 3 AUC (ng/mL*h)  0-1 h 175.0 ± 76.8   0-4 h  1881 ± 952.7 0-12 h 3448.9 ± 1936.3 0-24 h 3971.0 ± 2250.9 0-48 h 4446.5 ± 2488.8 0-96 h 4910.8 ± 2750.1

Results

As seen in Table 6, Composition 5 provided a C_(max) of 672.84 nanograms per milliliter (“ng/mL”) and a T_(max) of 3 hours. Further, Composition 6 provided an AUC of 175.0 at 1 hour, 1,881 at 4 hours, 3448.9 at 12 hours, 3971.0 at 24 hours, 4446.5 at 48 hours and 4910.8 at 96 hours.

Benefits, other advantages, and solutions to problems have been described herein with regard to specific embodiments. Furthermore, the connecting lines shown in various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical system. However, the benefits, advantages, solutions to problems, and any elements that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of the inventions. The scope of the inventions is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” Moreover, where a phrase similar to “at least one of A, B, or C” is used in the claims, it is intended that the phrase be interpreted to mean that A alone may be present in an embodiment, B alone may be present in an embodiment, C alone may be present in a single embodiment; for example, A and B, A and C, B and C, or A and B and C. Different cross-hatching is used throughout the figures to denote different parts but not necessarily to denote the same or different materials.

Systems, methods and apparatus are provided herein. In the detailed description herein, references to “one embodiment”, “an embodiment”, “an example embodiment”, etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading the description, it will be apparent to one skilled in the relevant art(s) how to implement the disclosure in alternative embodiments.

Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is to be construed under the provisions of 35 U.S.C. 112(f), unless the element is expressly recited using the phrase “means for.” As used herein, the terms “comprises”, “comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method or article, or apparatus. 

What is claimed is:
 1. A self-emulsifying cannabidiol composition comprising from about 1% to about 40% w/w cannabidiol and from about 40% to about 99% w/w of one or more surfactants selected from polyethylene glycol 40 hydrogenated castor oil, caprylocaproyl polyoxyl-8 glycerides, lauoryl polyoxylglycerides, oleoyl polyoxyl-6 glycerides, linoleoyl polyoxyl-6 glycerides, lauroyl polyoxyl-6 glycerides, propylene glycol monocaprylate, propylene glycol monolaurate, polyglyceryl-3 dioleate, a polysorbate and sorbitan monooleate, wherein w/w denotes weight by total weight of the composition.
 2. The composition of claim 1, wherein the one or more surfactants are selected from polyethylene glycol 40 hydrogenated castor oil, caprylocaproyl polyoxyl-8 glycerides, linoleoyl polyoxyl-6 glycerides, polyglyceryl-3 dioleate and polysorbate
 80. 3. The composition of claim 1, further comprising one or more cosolvents selected from propylene glycol and ethanol.
 4. The composition of claim 1, further comprising one or more oils selected from glyceryl monolinoleate, glyceryl monooleate, propylene glycol dicaprylocaprate, glycerol monostearate 40-55 and a medium chain triglyceride.
 5. The composition of claim 1, further comprising one or more antioxidants selected from alpha tocopherol, butylated hydroxy anisole, butylated hydroxy toluene, ascorbyl palmitate, ascorbic acid, sodium ascorbate, sodium metabisulfite, EDTA, citric acid, sodium bisulfite, sodium thiosulfate, thioglycerol and propyl gallate.
 6. The composition of claim 1, wherein the composition forms an emulsion having an average globule size from about 20 to about 5,000 nanometers when dispersed in an aqueous medium.
 7. The composition of claim 6, wherein the aqueous medium is gastric fluid.
 8. The composition of claim 1, wherein the composition is suitable for delivery to a gastrointestinal tract or a mucosa of an oral cavity.
 9. The composition of claim 1, wherein the composition is contained in a hard gelatin or soft gelatin capsule.
 10. A self-emulsifying cannabidiol composition comprising: from about 5% to about 35% w/w cannabidiol; from about 2% to about 60% w/w polyethylene glycol 40 hydrogenated castor oil; from about 2% to about 50% w/w of a surfactant selected from caprylocaproyl polyoxyl-8 glycerides, linoleoyl polyoxyl-6 glyceride or a combination thereof; and from about 0.1% to about 2% w/w alpha tocopherol, wherein w/w denotes weight by total weight of the composition.
 11. The composition of claim 10, wherein the polyethylene glycol 40 hydrogenated castor oil is at a concentration from about 10% to about 50% w/w and the surfactant selected from caprylocaproyl polyoxyl-8 glycerides, linoleoyl polyoxyl-6 glyceride or a combination thereof is at a concentration from about 20% to about 40% w/w.
 12. The composition of claim 10, further comprising from about 1% to about 15% w/w polyglyceryl-3 dioleate.
 13. The composition of claim 10, further comprising from about 5% to about 30% w/w of a cosolvent selected from propylene glycol, ethanol and a combination thereof.
 14. The composition of claim 10, wherein the composition forms an emulsion with an average globule size from about 100 to about 1,000 nanometers when dispersed in an aqueous medium.
 15. The composition of claim 10, wherein the composition forms an emulsion in less than 30 minutes upon contact with an aqueous medium including gastric fluid.
 16. A self-emulsifying cannabidiol composition comprising: about 20.5% w/w cannabidiol; about 12.0% w/w ethanol; about 9.0% w/w propylene glycol; about 17.0% w/w polyethylene glycol 40 hydrogenated castor oil; about 26.0% w/w caprylocaproyl polyoxyl-8 glycerides; about 4.0% w/w linoleoyl polyoxyl-6 glycerides; and about 0.4% w/w alpha tocopherol, wherein w/w denotes weight by total weight of the composition and wherein the composition forms an emulsion with an average globule size of about 201 nanometers when dispersed in an aqueous medium.
 17. A method of treating a disease selected from Prader-Willi syndrome, obesity, graft versus host disease, gelastic seizures/hypothalamic hamartoma, neonatal seizures, dystonia, central pain syndromes, phantom limb pain, multiple sclerosis, traumatic brain injury, radiation therapy, acute graft versus host disease, chronic graft versus host disease, T-cell autoimmune disorders, colitis, Dravet Syndrome, Lennox Gastaut Syndrome, mycolonic seizures, juvenile mycolonic epilepsy, refractory epilepsy, childhood absence epilepsy, schizophrenia, juvenile spasms, West syndrome, infantile spasms, refractory infantile spasms, tuberous sclerosis complex, brain tumors, neuropathic pain, cannabis use disorder, post-traumatic stress disorder, anxiety, early psychosis, Alzheimer's Disease, autism, acne, Parkinson's disease, social anxiety disorder, depression, diabetic retinopathy, diabetic nephropathy, diabetic neuropathy, ischemic injury of heart, ischemic injury of brain, chronic pain syndrome, and rheumatoid arthritis comprising administering a composition of claim 1 to a subject in need thereof.
 18. A method of treating withdrawal symptoms comprising administering a composition of claim 1 to a subject in need thereof, wherein the withdrawal symptoms are caused by the subject reducing or quitting use of an opioid, cocaine, heroin, an amphetamine or nicotine. 